Liquid cooled walled continuous slab casting mold with adjustable tapered walls



April 22, 1969 STRQHSCHEIN ET AL 3,439,736

' LIQUID COOLED WALLED CONTINUOUS SLAB CASTING MOLD WITH ADJUSTABLETAPERED WALLS Filed March 8, 1966 Sheet of 4 NI m C) m O 5/ o i I I I lI 1 1 L 1 I i l m L -f X l 1:) I k (I) j l/ \I F 1 l L 1 Inventors;Manf'edtradscbcin 7 s?! Glaser and HM Ell-Pu @gMM April 1959 M.STROHSCHEIN ET l- 3,

LIQUID COOLED WALLED CONTINUOUS SLAB CASTING MOLD WITH ADJUSTABLETAPERED WALLS v Filed March 8, 1966 Sheet 3 f 4 In VQfltD/S: M M1401$19-06 scfiein,

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TZur Mormon 3,439,736 CASTING A ril 22, 1969 M..STROHSCHE|N ETAL LIQUIDCOOLED WALLED CONTINUOUS SLAB MOLD WITH ADJUSTABLE TAPERED WALL SheetFiled March 8. 1966 'IIIIIIIIIIIIIIIII.

.m :w e r a MA, okut 9 41. w Ml fi V s ml m Apnl 22, 1969 M. STROHSCHEINE AL LIQUID COOLED WALLED CONTINUOUS SLAB CASTING MOLD WITH ADJUSTABLETAPERED WALLS Filed March 8. 1966 Sheet mm W wwww A m 1; .Q E N am M aUnited States Patent US. Cl. 164-273 6 Claims ABSTRACT OF THE DISCLOSUREA continuous casting mold has at least two mold walls that arepositionable by a differential motion mechanism at an adjustable taperand distance relative to the mold center.

The present invention relates to the constructive embodiment of a liquidcooled continuous casting mold with adjustable lateral walls inparticular to a liquid cooled plate mold of rectangular cross-sectionwith at least two conically adjustable mold walls, where the narrowsides of the mold between the broad sides of the mold are adjustable bytwo at the narrow sides pivotably mounted and by nuts secured screws.

For the manufacture of slabs by the continuous casting method it isknown to use so-called plate molds. The narrow sides of such moldsusually consist of integral plates. The broad sides may be constructedof a plurality of wall parts or, if desired, also consist of a singleplate.

Concerning plate molds it is basically known to provide wide sides aswell as the narrow sides with a certain taper. T-he taper of the widesides is normally given by the taper of the narrow sides between thewide sides and hardly changes with the dimension of the slab to be cast.Concerning the narrow sides, however, depending on the width of the slaba substantial change of the taper is necessary. In respect to molds, thewide sides of which consist of a plurality of wall parts and also inrespect to molds the wide sides of which are formed by a single wallpart, it has thus already been proposed to effect the adjustment of theinclination of these narrow sides by means of adjusting screws, mountedat the upper and lower ends together with respective adjusting nuts.

Experiences have proved that the adjustment of the different slab widthsas well as of the taper is too time consuming, in particular by thereconstruction outside of the device and the aligning work which must beperformed with maximum precision.

The essential object of the present invention thus resides in disclosinga means for continuous casting molds consisting of plates which doespermit the adjustment of different slab widths with the respective taperin most simple and precise manner.

The inventive liquid cooled plate mold of rectangular cross-section withat least two conically adjustable mold walls, where the narrow sides ofthe mold between the wide sides of the mold are adjustable by means oftwo at the narrow side pivotably connected and by nuts secured screws ischaracterized in that the screws do have different pitch and the nutssurrounding the screws and also serving as hearing are provided withworm wheels and are in engagement with a common worm shaft. According toa further inventive embodiment for the same pitch of both screws theworm wheels may have different diameter or different pitch.

3,439,736 Patented Apr. 22, 1969 "ice According to the first embodimentof the invention the lower screw is provided with a smaller pitch thanthe upper screw. Concerning the second embodiment the worm wheel of thelower screw has a greater diameter than the worm wheel of the upperscrew, or when there is provided the same diameter for the wheels, theworm wheel of the lower screw has a lower pitch of the screw threads.

The invention will now be illustrated with reference to the encloseddrawings, it being understood that these represent preferred embodimentswithout the invention being restricted thereto, the scope of protectionbeing stated in the accompanying claims.

In the drawings:

FIGURE 1 is a lateral view of the first embodiment of the adjustingmeans of the invention,

FIGURE 2 is a plan view on the adjusting means and a portion of the moldand the respective mold frame,

FIGURE 3 is a lateral view of the second embodiment of the invention,

FIGURE 4 is a side elevational view of the complete mold arrangement ofboth embodiments; and

FIGURE 5 is a plan view thereof.

In FIGURE 1 the narrow side 1 of a slab mold is shown in two difierentpositions 1, 1'. 1 represents the initial position, e.g., the minimummold width, 1 the final position. At the narrow side 1 there ispivotably mounted an upper screw 2 and lower screw .3. Such screws 2, 3are provided with a thread 4, 5- of different pitch. The lower screw 3has a smaller pitch than the upper screw 2. The screws 2, 3 aresurrounded and guided by guides 6 and 7, respectively, which do havenuts at their exterior end and are in engagement with the thread parts4, 5 of the screws 2, 3. The guides 6, 7 each are provided with a wormwheel 8, 9 and the worm wheels are in engagement with a common wormshaft 10. By the actuation of such worm shaft 10 the narrow side 1 of aslab mold can be shitfed into different positions under simultaneouslyadjusting the respective taper.

As shown in FIGURE 2 the adjusting means according to FIGURE 1 issupported on the frame 11 of a plate mold. The broad sides 12, 13 ofthis plate mold are secured in manner known per se by means of bolts 14.Between such plates 12, 13 there is arranged the narrow side 1 which canbe adjusted to different widths and respective taper.

FIGURE 2 further shows the worm wheel 8 of the upper screw guide and therespective worm shaft 10. The reference numerals 15, 16 indicate theinlets and, respectively, the outlets for the cooling liquid known perse for continuous casting molds.

FIGURE 3 illustrating the second embodiment shows screws 2, 3 providedwith a thread 4, 5 of equal pitch. The surrounding nuts 6, 7 are eachprovided with a worm wheel 8 and 9, respectively, of which the wormwheel 9 of the lower screw does have a greater diameter than the wormwheel 8 of the upper screw, or the worm wheel 9 of the lower screw uponthe same diameter of the wheels does have a smaller pitch of the wormthreads. In other respects the construction is the same as disclosed inrespect to the first embodiment.

In FIGURES 4 and 5 there is shown the frame of the plate mold, furtherthe wide sides 12, 13 secured by means of bolts 14. There is shown theposition of the adjustable mold walls together with the drive meansaccording to the invention.

It being understood that the present disclosure is not to be construedin a limiting sense, since obvious alterations and modifications will beobvious to the expert in the art.

Having thus described the invention what is claimed as novel and to besecured by Letters Patent is as follows.

What we claim is:

1. A liquid cooled continuous slab casting mold, comprising at least twomovable mold walls positionable at adjustable taper, and a differentialmotion mechanism connected to each movable mold wall for positioningsaid mold wall at an adjustable distance from the mold center andthereby at a predetermined adjustable taper relative to the vertical.

2. A liquid cooled mold, as claimed in claim 1, said differential motionmechanism comprising an upper and a lower screw of different pitch, anut in threaded engagement with each screw, a worm wheel connected toeach nut, and driving means connected to said worm wheels and beingoperable for simultaneously driving both worm wheels.

3. Plate mold according to claim 2, characterized in that the lowerscrews have a smaller pitch than the upper screw.

4. A liquid cooled mold, as claimed in claim 1, said differential motionmechanism comprising an upper and a lower screw of the same pitch, a nutin threaded engagement with each screw, a worm wheel connected to eachnut, said worm wheels having different diameters, and driving meansconnected to said worm wheels and operable for driving both worm wheelssimultaneously.

5. Plate mold according to claim 4, characterized in that the worm wheel(9) of the lower screw does have a greater diameter than the worm wheel(8) of the upper screw.

6. A liquid cooled mold, as claimed in claim 2, said worm wheels havingthe same diameter, and the lower screw having a smaller pitch than theupper screw.

References Cited UNITED STATES PATENTS 3,049,769 8/1962 Schultz 164-283XR 3,147,521. 9/1964 Boehm 16482 XR 3,228,071 1/1966 Schultz 164-2803,292,216 12/1966 Colombo 164281 3,375,865 4/1968 Boichenko et a1.164-283 FOREIGN PATENTS 1,125,594 3/ 1962 Germany.

I. SPENCER OVERHOLSER, Primary Examiner. R. S. ANNEAR, AssistantExaminer.

U.S. Cl. X.R. 164-280, 283

